All printers have switches or other controls on them to let them adapt to various hardware and software setups and to suit your personal needs. Front panel controls typically set the print font, spacing, mode (draft or near letter quality), and other final print options. The control's settings can usually be overridden by the software you use to print. Other printer controls, such as DIP switches, affect lower-level parameters that cannot be overridden, such as:
Consult your printer manual to determine the optimum settings. Every printer is different; with most, a certain amount of experimentation is necessary to determine the correct configuration. Two general rules to follow:
